2007 Fiscal Year Final Research Report Summary
Study on electron beam dynamics in a merger section of energy recovery linac light sources
| Project/Area Number |
18560806
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Nuclear engineering
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| Research Institution | Japan Atomic Energy Agency |
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Principal Investigator |
HAZIMA Ryoichi Japan Atomic Energy Agency, Quantum Beam Science Directorate, Group Leader (30218432)
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| Co-Investigator(Kenkyū-buntansha) |
IIJIMA Hokuto Japan Atomic Energy Agency, Quantum Beam Science Directorate, Senior Post-Doctoral (90361534)
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| Project Period (FY) |
2006 – 2007
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| Keywords | next-generation light source / energy-recovery linac / emittance / non-inertial snace charge force / electron beam |
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| Research Abstract |
Energy-recovery linac is a promising candidate fir future X-ray and gamma-ray light sources. Since performance of the ERL light source is restricted by electron beam parameters, generation of high-brightness electron beam is one of the critical issues to realize future ERL light sources. We studied on electron beam dynamics in a merger of ERL. The merger is a component to merger two beams, injection and recirculation, into the same trajectory. In the merger, emittance growth may occur due to transverse space charge force, longitudinal space charge force, and coherent synchrotron radiation. We have developed a strategic method to design an ERL merger to minimize the emittance growth, in which emittance growth is compensated by matching space-charge-induced dispersion to betatron envelope. A simulation code for particle tracking has also been developed for calculation of emittance growth in an ERL merger. We have applied our emittance compensation technique to design of the Compact ERL and gamma-ray sources. The Compact EEL is a test facility for future X-ray light sources. Typical performance of ERL injectors based on our design is as follows: normalized eminence 0.3 mm-mrad for average current 100mA (77pC, 1.3GHz), 0.1 mm-mrad for 10 mA (7.7pC, L3GHz).
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Research Products
(22 results)
